The coefficient of determination (R2) has been the industry standard in validating a calibration curve for flow injection analysis. However, a push for more stringent regulations of environmental nutrients and contaminants have led to a reevaluation of validating a calibration curve. This presentation will compare and contrast R2 with a new metric, relative standard error (RSE), as methods for validating environmental measurements. Both practical examples and idealizations are posed to illustrate the benefits and potential pitfalls of each technique.

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Disclaimer:
This publication was developed under Assistance Agreement No. X3-834888601-0 awarded by the U.S. Environmental Protection Agency. It has not been formally reviewed by EPA. The views expressed in this document are solely those of The NELAC Institute and EPA does not endorse any products or commercial services mentioned in this publication.